DE3534571C2 - - Google Patents

Info

Publication number
DE3534571C2
DE3534571C2 DE3534571A DE3534571A DE3534571C2 DE 3534571 C2 DE3534571 C2 DE 3534571C2 DE 3534571 A DE3534571 A DE 3534571A DE 3534571 A DE3534571 A DE 3534571A DE 3534571 C2 DE3534571 C2 DE 3534571C2
Authority
DE
Germany
Prior art keywords
layer
protective layer
magneto
sic
recording material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE3534571A
Other languages
German (de)
English (en)
Other versions
DE3534571A1 (de
Inventor
Takahiko Ishiwatari
Hiroyoshi Tokio/Tokyo Jp Kishi
Hisaaki Kawade
Masaaki Matsushima
Mitsuharu Sawamura
Kazuoki Yokohama Kanagawa Jp Honguu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of DE3534571A1 publication Critical patent/DE3534571A1/de
Application granted granted Critical
Publication of DE3534571C2 publication Critical patent/DE3534571C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
    • G11B7/2548—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of inorganic materials
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • G11B7/2578—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G11B2007/24302—Metals or metalloids
    • G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
    • G11B2007/2571—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing group 14 elements except carbon (Si, Ge, Sn, Pb)
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
    • G11B2007/25713—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing nitrogen
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
    • G11B2007/25715—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing oxygen
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
    • G11B7/2534—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polycarbonates [PC]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
    • G11B7/2585—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on aluminium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146—Laser beam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/162—Protective or antiabrasion layer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
DE19853534571 1984-09-28 1985-09-27 Lichtaufzeichnungsmaterial Granted DE3534571A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59203034A JPS6180640A (ja) 1984-09-28 1984-09-28 光学的記録媒体

Publications (2)

Publication Number Publication Date
DE3534571A1 DE3534571A1 (de) 1986-04-03
DE3534571C2 true DE3534571C2 (fr) 1992-03-26

Family

ID=16467251

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853534571 Granted DE3534571A1 (de) 1984-09-28 1985-09-27 Lichtaufzeichnungsmaterial

Country Status (5)

Country Link
US (1) US4658388A (fr)
JP (1) JPS6180640A (fr)
DE (1) DE3534571A1 (fr)
FR (1) FR2571168B1 (fr)
GB (1) GB2165264B (fr)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801499A (en) * 1985-01-24 1989-01-31 Seiko Epson Corporation Optical recording medium
JPH0831220B2 (ja) * 1985-08-19 1996-03-27 セイコーエプソン株式会社 光記録媒体
US6077585A (en) * 1985-01-24 2000-06-20 Seiko Epson Corporation Optical recording medium and method of preparing same
US4861671A (en) * 1985-10-23 1989-08-29 Kerdix, Inc. Magneto-optic recording media with protective layer
US5253233A (en) * 1985-12-17 1993-10-12 Canon Kabushiki Kaisha Method of making a magneto-optical recording medium that includes a light interference layer having specified characteristics
JPS62157347A (ja) * 1985-12-28 1987-07-13 Kyocera Corp 光磁気記録素子及びその製法
JPS62204451A (ja) * 1986-03-03 1987-09-09 Daicel Chem Ind Ltd 光デイスク用プラスチツク基板とその製法
JP2526864B2 (ja) * 1986-04-16 1996-08-21 ソニー株式会社 光学記録媒体
US4897829A (en) * 1986-11-20 1990-01-30 Canon Kabushiki Kaisha Cardlike optical recording medium
US4849304A (en) * 1986-12-17 1989-07-18 Tdk Corporation Optical recording medium
US4902584A (en) * 1986-12-25 1990-02-20 Tdk Corporation Optical recording medium
JPH07111788B2 (ja) * 1987-01-23 1995-11-29 株式会社日立製作所 光情報記録媒体
DE3716736A1 (de) * 1987-05-19 1988-12-01 Basf Ag Flaechenfoermiges, mehrschichtiges, magneto-optisches aufzeichnungsmaterial
US5305254A (en) * 1987-12-15 1994-04-19 Sharp Kabushiki Kaisha Magneto-optic memory device
US5158834A (en) * 1988-02-01 1992-10-27 Minnesota Mining And Manufacturing Company Magneto optic recording medium with silicon carbide dielectric
US4917970A (en) * 1988-02-01 1990-04-17 Minnesota Mining & Manufacturing Company Magneto optic recording medium with silicon carbide dielectric
DE3803000A1 (de) * 1988-02-02 1989-08-10 Basf Ag Flaechenfoermiges, mehrschichtiges magneto-optisches aufzeichnungsmaterial
DE3803013A1 (de) * 1988-02-02 1989-08-10 Basf Ag Verfahren zur herstellung eines flaechenfoermigen, mehrschichtigen, magneto-optischen aufzeichnungsmaterials
US5109377A (en) * 1988-08-22 1992-04-28 Fuji Photo Film Co., Ltd. Magneto-optical recording medium and method of producing the same
US5249175A (en) * 1988-09-09 1993-09-28 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and information recording and reproducing method therefor
CA1333820C (fr) * 1988-09-13 1995-01-03 Masahiko Sekiya Support d'enregistrement magneto-optique
EP0372517A3 (fr) * 1988-12-07 1990-09-05 Tosoh Corporation Milieu d'enregistrement magnéto-optique, et son procédé de fabrication
US5142513A (en) * 1989-04-20 1992-08-25 Victor Company Of Japan, Ltd. Magneto-optical storage medium and magneto-optical overwrite system with magnetic characteristic change by variation of thermal condition for recording information
EP0410575B1 (fr) * 1989-07-28 1995-01-11 Minnesota Mining And Manufacturing Company Support d'enregistrement magnéto-optique avec une couche diélectrique en carbure de silicium hydrogéné
KR0172861B1 (ko) * 1990-08-03 1999-04-15 이헌조 광자기 디스크구조
JP3038853B2 (ja) * 1990-09-13 2000-05-08 株式会社ニコン 高レベルのマージンが拡大したオーバーライト可能な光磁気記録媒体
US5251202A (en) * 1991-05-23 1993-10-05 Ricoh Company, Ltd. Optical information recording medium having multi-layered structures for preventing undesired reflection and electric charging
US5328813A (en) * 1992-06-30 1994-07-12 The Dow Chemical Company Method for the preparation of optical recording media containing overcoat
JP4571238B2 (ja) * 1996-12-24 2010-10-27 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ フェーズ変化記録層を有する光学記録媒体
JP3730366B2 (ja) * 1997-07-03 2006-01-05 株式会社東芝 薄膜磁気素子
WO2006130496A1 (fr) * 2005-05-27 2006-12-07 Consumable Media Llc Disques optiques a nombre de lectures limite
US20090075015A1 (en) * 2007-07-24 2009-03-19 Detty Michael R Limited Play Optical Discs
US20110032640A1 (en) * 2009-08-10 2011-02-10 Hitachi Global Storage Technologies Netherlands B.V. Multi-layer, thin film overcoat for magnetic media disk

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787223A (en) * 1968-10-16 1974-01-22 Texas Instruments Inc Chemical vapor deposition coatings on titanium
US3665483A (en) * 1969-06-06 1972-05-23 Chase Manhattan Capital Corp Laser recording medium
DE1929171C3 (de) * 1969-06-09 1979-06-07 Basf Ag, 6700 Ludwigshafen Schichtmagnetogrammträger
US3716844A (en) * 1970-07-29 1973-02-13 Ibm Image recording on tetrahedrally coordinated amorphous films
US4277540A (en) * 1971-05-03 1981-07-07 Aine Harry E Thin film magnetic recording medium
DE2218306C3 (de) * 1972-04-15 1981-07-30 Basf Ag, 6700 Ludwigshafen Magnetischer Aufzeichnungsträger
JPS5674843A (en) * 1979-11-21 1981-06-20 Fuji Photo Film Co Ltd Photomagnetic recording medium
DE3118058A1 (de) * 1980-05-14 1982-03-11 RCA Corp., 10020 New York, N.Y. Aufzeichnungstraeger und verfahren zum schreiben einer informationsspur sowie zum loeschen einer in dem traeger gespeicherten information
EP0045183B1 (fr) * 1980-07-25 1984-12-05 Asahi Kasei Kogyo Kabushiki Kaisha Matériau d'enregistrement
US4517217A (en) * 1980-09-09 1985-05-14 Westinghouse Electric Corp. Protective coating means for articles such as gold-plated jewelry and wristwatch components
EP0049821B1 (fr) * 1980-10-09 1987-04-15 Kabushiki Kaisha Toshiba Elément d'enregistrement de données
DE3039821A1 (de) * 1980-10-22 1982-06-03 Robert Bosch Gmbh, 7000 Stuttgart Mehrschichtsystem fuer waermeschutzanwendung
JPS5792401A (en) * 1980-11-25 1982-06-09 Fuji Photo Film Co Ltd Magnetic recording and reproducing method
CA1185013A (fr) * 1981-01-14 1985-04-02 Kenji Ohta Support de memoire magneto-optique
JPS5819739A (ja) * 1981-07-29 1983-02-04 Sony Corp 薄膜磁気記録媒体
JPS5859454A (ja) * 1981-09-28 1983-04-08 Konishiroku Photo Ind Co Ltd 電子写真感光体
NL8200415A (nl) * 1982-02-04 1983-09-01 Philips Nv Optische uitleesbare informatieschijf.
JPH079699B2 (ja) * 1982-04-15 1995-02-01 日本電気株式会社 磁気ディスク記憶媒体
DE3317101A1 (de) * 1982-05-10 1983-11-10 Canon K.K., Tokyo Magnetooptischer aufzeichnungstraeger
JPS58196635A (ja) * 1982-05-12 1983-11-16 Matsushita Electric Ind Co Ltd デイジタル信号記録、再生デイスク
JPH0650683B2 (ja) * 1982-09-30 1994-06-29 日本電気株式会社 磁気記憶体
DE3336445A1 (de) * 1982-10-06 1984-04-12 Fuji Photo Film Co., Ltd., Minamiashigara, Kanagawa Lichtinformationsaufzeichnungsmaterial
DE3382791T2 (de) * 1982-12-15 1995-12-07 Sharp Kk Magneto-optischer Speicher.

Also Published As

Publication number Publication date
JPH0481817B2 (fr) 1992-12-25
FR2571168A1 (fr) 1986-04-04
GB2165264A (en) 1986-04-09
JPS6180640A (ja) 1986-04-24
DE3534571A1 (de) 1986-04-03
US4658388A (en) 1987-04-14
GB8523782D0 (en) 1985-10-30
GB2165264B (en) 1988-05-25
FR2571168B1 (fr) 1992-05-29

Similar Documents

Publication Publication Date Title
DE3534571C2 (fr)
DE3500314C2 (fr)
DE3382671T2 (de) Magneto-optischer speicher.
DE3335689C2 (fr)
DE69022497T2 (de) Optisches Aufzeichnungsmedium.
DE69112168T2 (de) Magnetooptisches Aufzeichnungsmedium.
DE68921527T2 (de) Magnetooptischer Aufzeignungsträger.
DE3608021C2 (fr)
DE3409747C2 (fr)
DE3528701C2 (fr)
DE3413086A1 (de) Ferrimagnetische oxide und diese enthaltende magneto-optische aufzeichnungsmaterialien
DE69115963T2 (de) Magnetooptisches Aufzeichnungsmedium
DE3348423C2 (de) Verwendung einer amorphen magnetischen quaternären GdTbFeCo-Legierung für die Herstellung einer magnetooptischen Aufzeichnungsschicht
DE3334923C2 (fr)
DE3443049C2 (fr)
DE3852329T2 (de) Magneto-optisches Aufzeichnungsmedium und Verfahren.
DE19706483B4 (de) Magnetooptischer Aufzeichnungsträger
DE69020992T2 (de) Magneto-optisches Aufzeichnungsmedium.
DE3903484A1 (de) Magnetooptischer duennschichtfilm
DE69125919T2 (de) Magneto-optisches Aufzeichnungsmedium
DE68926826T2 (de) Zweischichtiger magneto-optischer Aufzeichnungsträger mit einer Schicht niedriger Koerzitivkraft, bestehend aus Gd und mindestens Tb oder Dy
DE3508476C2 (de) Optisches Aufzeichnungsmaterial
DE3686530T2 (de) Aufzeichnungstraeger, versehen mit hochdichter information.
DE3604642C2 (fr)
DE68909520T2 (de) Magneto-optisches Speichermedium.

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8305 Restricted maintenance of patent after opposition
D4 Patent maintained restricted
8339 Ceased/non-payment of the annual fee